Sorry to hear you're having trouble, Ron. Was the place that refused to touch them one of those cookie cutter car tire places? A lot of us go to places that work on semi trucks to get tires replaced/remounted on the 2-piece rims. I have a little hole-in-the-wall place here and my 2-piece rims don't faze them a bit.
Good luck, and I'm sorry I can't answer your other question -- somebody ought to be along soon who can.
Regards,
John
